| Title: | Photochemistry of the indoor air pollutant acetone on Degussa P25 TiO2 studied by chemical ionization mass spectrometry |
| Author(s): | Schmidt CM; Buchbinder AM; Weitz E; Geiger FM; |
| Address: | "Department of Chemistry and the Institute for Catalysis and Energy Processes, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA" |
| ISSN/ISBN: | 1089-5639 (Print) 1089-5639 (Linking) |
| Abstract: | "We have used chemical ionization mass spectrometry (CIMS) to study the adsorption and photochemistry of several oxygenated organic species adsorbed to Degussa P25 TiO2, an inexpensive catalyst that can be used to mineralize volatile organic compounds. The molecules examined in this work include the common indoor air pollutant acetone and several of its homologs and possible oxidation and condensation products that may be formed during the adsorption and/or photocatalytic degradation of acetone on titanium dioxide catalysts. We report nonreactive uptake coefficients for acetone, formic acid, acetic acid, mesityl oxide, and diacetone alcohol, and results from photochemical studies that quantify, on a per-molecule basis, the room-temperature photocatalytic conversion of the species under investigation to CO2 and related oxidation products. The data presented here imply that catalytic surfaces that enhance formate and acetate production from acetone precursors will facilitate the photocatalytic remediation of acetone in indoor environments, even at room temperature" |
| Keywords: | "Acetone/*chemistry Adsorption Air Pollutants/*chemistry *Air Pollution, Indoor Catalysis Mass Spectrometry/*methods Photochemistry Titanium/*chemistry Volatilization;" |
| Notes: | "MedlineSchmidt, Catherine M Buchbinder, Avram M Weitz, Eric Geiger, Franz M eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2007/11/23 J Phys Chem A. 2007 Dec 20; 111(50):13023-31. doi: 10.1021/jp076745+. Epub 2007 Nov 22" |
